Abstract: To achieve arterial coordination and improve operational efficiency, the space-time characteristics of vehicle queuing at adjacent intersections were analyzed based on the consideration of vehicle arriving in a general state of traffic-wave in coordinated signal control system. Then, the internal mechanism of arterial coordination was considered that the queue was dissipated as vehicle reached the end of the queue. According to the aggregation and dispersion of queue, intersection offset model based on traffic-wave theory was established. Giving the intersections relevance and the relationship between demand and supply, the optimization strategy for arterial control parameter was proposed. Intersections on Lijinag Road, Qingdao City, were used as example to verify the feasibility and practicability of the offset model and optimization strategy for cycle, signal phase and split. The results indicate that the control method has remarkable effect on vehicle travel time and vehicle stopping times.

Key words: engineering of communication and transportation system, traffic-wave theory, offset, arterial coordination, queue